body {
    min-height: 450px;
    height: 100vh;
    margin: 0;
    background: radial-gradient(circle, #fb7299, #a53454,#751e37,#4d0e20);
}

.stage {
    height: 300px;
    width: 500px;
    margin: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    perspective: 800px;
    transform-style: preserve-3d;
}

@keyframes bilibil{
    0%{
        transform: rotateY(40deg) rotateX(33deg) translateZ(0);
    }
    100%{
        transform: rotateY(-40deg) rotateX(-43deg);
    }
}
.layer {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    animation: bilibil 5s infinite alternate ease-in-out ;
    
}

.layer i{
    font-size: 150px;
    font-weight: bold;
    text-align: center;
    height: 100%;
    width: 100%;
    color: whitesmoke;
    text-shadow: 4px 0 10px rgba(0,0,0,.13);
}
.layer:nth-child(-n + 10) i {
    -webkit-text-stroke: 3px #fb7299;
}
.layer:nth-child(-n + 11) i {
    -webkit-text-stroke: 15px #fb7299;
    text-shadow: 6px 0 6px #751e37,5px 5px 5px #4d0e20,0 6px 6px #751e37;
}
.layer:nth-child(-n+12) i {
    -webkit-text-stroke: 15px #fb7299;
}
.layer:first-child i {
    -webkit-text-stroke: 17px rgba(0,0,0,.1);
}

.layer:last-child i {
    color : #fff;
    text-shadow: none;
}












